Analysis of concrete entering of the underground station units construction based on the Luoning Pumped Storage Power Station

Abstract

The underground powerhouse of a pumped storage power station is typically characterized by confined spaces and fully enclosed surroundings. In particular, the turbine section features a complex structural layout and restricted access routes, posing significant challenges for concrete construction and complicating the formulation of construction plans. Among these, the method of concrete placement is a critical step during pouring. Improper selection can lead to inefficiencies and resource wastage. Drawing on the concrete construction experience of the Luoning pumped storage power station, this study analyzes the sectional structure and characteristics of each layer within the powerhouse, evaluates the performance of applicable equipment, and considers recent advancements and trends in construction techniques and equipment utilization. Based on the specific conditions of each section, optimal combinations of equipment were selected to determine the most efficient concrete placement method. Overall, it is deemed both scientific and practical to adopt ground pumps and bridge cranes with concrete buckets for sections below the spiral case, while tower cranes are recommended for sections above it. As each layer of the powerhouse units varies, careful consideration of specific site conditions is necessary for flexible implementation. The findings and method ologies presented offer valuable references and systematic approaches for the analysis and determination of concrete placement strategies in similar projects.

Keywords

pumped storage power station / underground powerhouse / concrete placement / sectional construction / concrete pump / concrete bucket